Updated preloading code snippets.

PiperOrigin-RevId: 875299734

Author: Nicholas Ventimiglia

java/NextGenExample/app/src/main/java/com/example/snippets/InterstitialAdSnippets.java

@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -128,5 +128,15 @@ public void onAdPaid(AdValue value) {
   private boolean isAdAvailable(String adUnitId) {
     return InterstitialAdPreloader.isAdAvailable(adUnitId);
   }
+
   // [END isAdAvailable]
+
+  // [START stop_preload]
+  private void stopPreloading(String adUnitId) {
+    // Stops the preloading and destroys preloaded ads.
+    InterstitialAdPreloader.destroy(adUnitId);
+    // Stops the preloading and destroys all ads.
+    InterstitialAdPreloader.destroyAll();
+  }
+  // [END stop_preload]
 }

kotlin/NextGenExample/app/src/main/java/com/example/snippets/InterstitialAdSnippets.kt

@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -116,6 +116,16 @@ private class InterstitialAdSnippets {
 
   // [END isAdAvailable]
 
+  // [START stop_preload]
+  private fun stopPreloading(adUnitId: String) {
+    // Stops the preloading and destroys preloaded ads.
+    InterstitialAdPreloader.destroy(adUnitId)
+    // Stops the preloading and destroys all ads.
+    InterstitialAdPreloader.destroyAll()
+  }
+
+  // [END stop_preload]
+
   private companion object {
     const val TAG = "InterstitialAdSnippets"
   }